D.C. GENERATION (cont.)
(b) Cleaning and Inspection
1 Clean the rotor, stator and bearings with a clean cloth. Do not clean these parts with solvent.
2 Rotate the front bearing on the drive end of the rotor shaft. Check for any scraping noise,
looseness, or roughness. Look for excessive lubricant leakage. If any of the conditions
exist, replace bearing.
3 Inspect the rotor shaft rear bearing surface for roughness or severe chatter marks.
Replace the rotor assembly if the shaft is not smooth.
4 Place the rear bearing on the slip-ring end of the rotor shaft and rotate the bearing. Make
the same check for noise, looseness, or roughness as was made for the front bearing.
Inspect the rollers and cage for damage. Replace the bearing if these conditions exist, or
if the lubricant is lost or contaminated.
5 Check the pulley and fan for excessive looseness on the rotor shaft. Replace any pulley
or fan that is loose or bent out of shape.
6 Check both the front and rear housings for cracks, particularly in the webbed areas and at
the mounting ear. Replace damaged or cracked housings.
7 Check all wire loads on both the stator and rotor assemblies for loose or broken soldered
connections and for burned insulation. Resolder poor connections. Replace parts that
show signs of burned insulation.
– CAUTION –
Do not turn down slip-rings beyond a minimum diameter of
1.22 inches. If the rings are badly damaged, replace the rotor
assembly.
8 Check the slip-rings (brush contacts) for nicks and surface roughness. Nicks and scratches
may be removed by turning down the slip rings.
9 Replace brush assembly if brushes are worn beyond 5/16 inch minimum length.
(c) Rotor Continuity Test (Refer to Figure 28.)
1 Separate front housing and rotor assembly from rear housing by removing four housing-
thru bolts and separating rear and front housings. Springs and brushes are not retained by
brush holder when housings are separated.
2 Set the ohmmeter selector switch on resistance scale 1 and zero meter.
3 Touch one lead of ohmmeter to each segment of the slip ring. The meter should read 3 to
5 ohms.
4 Readings higher than 5 ohms indicate a damaged solder connection at the slip rings or a
broken wire.
5 Readings lower than 3 ohms indicate a shorted wire or slip ring.
6 Replace the rotor if repairs cannot be made.
PIPER AIRCRAFT
PA-32R-301/301T
MAINTENANCE MANUAL
24-30-00
Page 24-32
Reissued: July 1, 1993
1L8
Summary of Contents for PA-32R-301T SARATOGA S
Page 26: ...CHAPTER 4 AIRWORTHINESS LIMITATIONS 1C1 ...
Page 29: ...CHAPTER 5 TIME LIMITS MAINTENANCE CHECKS 1C4 ...
Page 53: ...CHAPTER 6 DIMENSIONS AND AREAS 1D6 ...
Page 64: ...CHAPTER 7 LIFTING AND SHORING 1D21 ...
Page 68: ...CHAPTER 8 LEVELING AND WEIGHING 1E1 ...
Page 72: ...CHAPTER 9 TOWING AND TAXIING 1E5 ...
Page 76: ...CHAPTER 10 PARKING AND MOORING 1E9 ...
Page 80: ...CHAPTER 11 REQUIRED PLACARDS 1E13 ...
Page 92: ...CHAPTER 12 SERVICING 1F1 ...
Page 126: ...CHAPTER 20 STANDARD PRACTICES AIRFRAME 1G17 ...
Page 127: ...THIS PAGE INTENTIONALLY LEFT BLANK ...
Page 139: ...CHAPTER 21 ENVIRONMENTAL SYSTEMS 1H5 ...
Page 188: ...CHAPTER 22 AUTOFLIGHT 1J7 ...
Page 193: ...CHAPTER 23 COMMUNICATIONS 1J12 ...
Page 203: ...CHAPTER 24 ELECTRICAL POWER 1J22 ...
Page 263: ...CHAPTER 25 EQUIPMENT FURNISHINGS 2A13 ...
Page 269: ...CHAPTER 27 FLIGHT CONTROLS 2A20 ...
Page 332: ...CHAPTER 28 FUEL 2D11 ...
Page 363: ...CHAPTER 29 HYDRAULIC POWER 2E18 ...
Page 404: ...CHAPTER 30 ICE AND RAIN PROTECTION 2G16 ...
Page 470: ...CHAPTER 32 LANDING GEAR 3A13 ...
Page 550: ...CHAPTER 33 LIGHTS 3D24 ...
Page 562: ...CHAPTER 34 NAVIGATION AND PITOT STATIC 3E12 ...
Page 582: ...CHAPTER 35 OXYGEN 3F8 ...
Page 604: ...CHAPTER 37 VACUUM 3G6 ...
Page 616: ...CHAPTER 39 3G18 ELECTRIC ELECTRONIC PANELS MULTIPURPOSE PARTS ...
Page 620: ...CHAPTER 51 STRUCTURES 3G22 ...
Page 636: ...CHAPTER 52 DOORS 3H14 ...
Page 650: ...CHAPTER 55 STABILIZERS 3I4 ...
Page 662: ...CHAPTER 56 WINDOWS 3I16 ...
Page 670: ...CHAPTER 57 WINGS 3I24 ...
Page 688: ...CHAPTER 61 PROPELLER 3J18 ...
Page 704: ...CHAPTER 70 STANDARD PRACTICES ENGINES 3K10 ...
Page 708: ...CHAPTER 71 POWER PLANT 3K14 ...
Page 737: ...CHAPTER 73 ENGINE FUEL SYSTEM 4A13 ...
Page 749: ...CHAPTER 74 IGNITION 4B1 ...
Page 783: ...CHAPTER 77 ENGINE INDICATING 4C11 ...
Page 793: ...CHAPTER 78 EXHAUST 4C21 ...
Page 801: ...CHAPTER 79 OIL 4D5 ...
Page 805: ...CHAPTER 80 STARTING 4D9 ...
Page 819: ...CHAPTER 81 TURBINES 4D23 ...
Page 833: ...CHAPTER 91 CHARTS WIRING DIAGRAMS 4E13 ...